Mastech MS2208 User manual

I
Contents
Safety Instructions .................................................. 2
Safety Sign ............................................................... 3
General Description................................................. 3
Features .................................................................... 4
Appearance .............................................................. 6
Knob Switch Operations ......................................... 8
Button Switch Operations .................................... 10
LCD DISPLA ......................................................... 12
Hz ............................................................................ 13
Instruction Manual ................................................ 15
AC voltage (V) measurement .............................. 15
AC CURRENT measurement ................................ 17
Test of single-phase circuit .................................. 19
cosΦ, sinΦ, and phase angle measurement ..... 22
Single-phase three-line circuit ............................. 22
Input Voltage and Current ................................... 23
During power measurement, if input voltage is over
600 (RMS) or current over 200 A (RMS), “OL”
symbol will be displayed and bar symbol shown in
full scale. ................................................................. 23

II
Backlight ................................................................. 23
Auto Power Off ...................................................... 24
Power curve diagram ............................................ 24
Battery-low Indication .......................................... 26
General specification ............................................ 27
Technical specification .......................................... 29
Accessories ............................................................. 32

1
Please carefully read the instruction manual before
using the tester, and pay special attention to
“Warning” content. Please follow instructions under
“Warning”.
1. Please be very careful when test voltage is
higher than AC 30 , and do keep in mind that
your finger shall not exceed the hand-shielding
part of the test probe.
2. Do not measure voltage which is higher than the
allowed input limit.
3. Before use, please check the meter and test
probe; do not carry out testing in case the test
probe is naked, tester housing is damaged, or
there is no LCD display, etc..
4. It meets requirements of safety standards only
when the meter is used together with the
supplied test probes. In case the test probe is
damaged and needs replacement, it is required to
replace it with a test probe of the same model

2
and identical electrical specifications.
5. Please never carry out any voltage measurement
whenever the test probe is inserted in any
current outlet.
6. Please do not expose the meter to strong light,
high temperature, or dampness.
Before use, please carefully read this
instruction manual. Especially safety
contents!
Safety Instructions
The digital power meter is designed and
manufactured in accordance with international
standard, IEC61010-1, and international safety
specification, IEC1010-2-032, and the meter strictly
follows the safety standard of double-insulation AC
600 CAT III.

3
Safety Sign
Important safety signs; please refer to
instruction manual
High voltage hazard
Earthing
Double insulation (Category-II safety
equipment)
Battery low Indicator
General Description
The digital power meter is a hand-held intelligent
harmonic power tester, with both functions of digital
current testing and power testing. The tester is
comprised of three channels including voltage,
current, and power as well as a micro single chip
system, and it is equipped with a powerful software
for measurement and data processing functions; it can

4
measure, calculate, and display voltage, current,
active power, power factor, apparent power, passive
power, frequency, harmonic parameters, with stable
performance and operation convenience. The meter is
especially suitable for the measurement and
examination of on-site power equipment and
power-supplying circuits; with hand-held clamp
structure, small volume, and light weight, it can be
easily carried by the user, which makes it easy and
fast for doing measurement. For measurement of
sing-phase power, The meter is your ideal choice.
Features
1. The meter can be used for testing power, voltage,
current, peak value, phase, frequency, power
factor, phase angle, and reaction factor, etc. of
single-/three-phase circuit; automatic phase
sequence testing is possible for 3-phase
measurement.

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2. True effective value measurement: accurate
measurement is possible even with serious
distortion in current waveform.
3. Low-consumption high-speed single-chip
microprocessor is employed and sophisticated
algorithm is applied, as a result, results can be
obtained rapidly and precisely, and up to 20
harmonics and distortion value thereof can be
measured.
Hand-held, clamp-type structure, with light weight,
convenient for carry-on.

6
Appearance
1
2
3
4
5
7
8
m
6

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1. Current clamp size：Ф26mm
2. Function-switching knob :Rotation knob for
selecting different measuring function
3. Function-selection button: Button for operating
the measuring functions
4. Input terminal
T
erminal
Function
FunctionFunction
Function
V Input terminal for measuring the first
phase; use yellow test probe for
connection
COM Input terminal for measuring the 2nd
phase; use black test probe for
connection. Common terminal: ground
input terminal (earthing) for all
measuring functions; use black test probe
for connection.
5. LCD display :4-digit digital display; 7-section

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LCD for displaying measurement operation
function, test result, and unit sign.
6. H/ 键：HOLD button :DATA HOLD
button; press down HOLD button, and the last
reading will be held and displayed on the display,
and “HOLD” symbol will be shown; press
HOLD button again, and the meter will switch
back to normal measurement mode.
7. Trigger :Press down the trigger, and the clamp
will open; release it, and the clamp will close.
8． LED Lamp
In power and current mode ,press button
open or close Lamp
Knob Switch Operations
The function-switching knob is used for powering-on
and for switching to any measurement function in the
following table.

9
Knob position description
Sign Knob position Functions
OFF Powering-off
position
For powering-off
KW Active power
position
For measuring ac
tive power, etc.
W power position For measuring
active power, etc.
V～
～～
～ AC-voltage har
monics test posi
tion
For measuring A
C-voltage harmon
ics, etc.
A～
～～
～ AC-current har
monics test posi
tion
For measuring A
C-current harmon
ics, etc.
mA～
～～
～ AC-voltage har
monics test posi
tion
For measuring A
C-voltage harmon
ics, etc.

10
Note:
When the meter is automatically powered off be
sure to switch the knob to “OFF” position; turn
on the meter after 5 seconds.
Button Switch Operations
Button descriptions
SN Function-selection button
1 MODE Test-mode switching button
2 ▲ Reverse-search button
3 ▼ Forward-search button
4 MIN/MAX MAX/MIN Value
5 H/ HOLD/LIGHT
The following functions can be realized through
button operations:
1．MODE：
Under KW/W test mode, you can press MODE
button to switch the display of active power and
passive power; under A/ ~ test mode, you can switch

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the display among total harmonic distortion rate F, r,
and harmonic percentage.
2．▲：
press ▲ button to change view MAX value,MI
N value,measuring time; During testing harmonics
, you can change the times of harmonics.
press ▲ button to search backward thestored dat
a and show it on LCD. With every press of the
button, the searching cursor will move one step
backward to the previous data.
3．▼ ：
press ▼ button to change view MAX value,MIN
value,measuring time; During testing harmonics,
you can change the times of harmonics.
press ▼ button to search foreward thestored data
and show it on LCD. With every press of the
button, the searching cursor will move one step f
oreward to the previous data.
4．MAX/MIN：
：：
：
In test mode ,press MAX/MIN button to iew

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the max /min Power,current, oltage.
5．HOLD/ ：
：：
：
After measurement, press this button to hold this
data on LCD; after powering-off, data will display
Press this button longer than 1S,Open or close the
back light.
LCD DISPLA

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LCD symbol
Descripti
on
LCD
symbol
Descripti
on
AutoPowe
r Off
HOLD
Hold
LAG
Phase
angle lag
LEAD Phase
angle
lead
Battery
power
indication
o Phase
angle
(degree)
SINФ
Phase
angle
(degree)
COSФ Power
factor
AC
symbol
PEAK Peak
value
Hz
Frequency
Negative
symbol
MIN Minimum
value
MAX Maximu
m value
USED
Used READ
read
W
watt A current
Ar
Passive
power
VA Apparent
power
PHASE phase TRMS TRMS
%
Harmonic
percentag
e
oltage

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LCD symbol
Descripti
on
LCD
symbol
Descripti
on
%THD
Total harmonics distortion ratio
H01F Total harmonics distortion ratio F
(relative to base wave)
H01r Total harmonics distortion ratio r
(relative to real effective value)

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Instruction Manual
AC voltage (V) measurement
M AS T E C H
TL88-1
UL
M A S TE C H
TL88-1
UL
AC
V
m

16
1. According to the connection mode as above
Table , switch the function switching knob to ~,
select corresponding sockets from ,COM
terminal, and insert the test wire.
2. Connect the two test probes 1, COMto the
power source or load to be tested. The meter will
automatically test and display the result, and the
present harmonics percentage will be shown on
the following line.
3. Under voltage test mode, press MAX/MIN
button to view Max or Min value
4. Press MODE button to show harmonics
percentage on LCD, and the total harmonic
distortion ratio F and R will be cyclically
displayed. Press▲/▼ button to display value
of each measurement of the harmonic.

17
AC CURRENT measurement
3
2
1
m
N

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1. Switch the function knob to A~ position;
2. Pull the trigger to open the clamp, and then clip
a wire which is to be tested; the measured
current value will be automatically shown on
LCD
3. Press MODE button to show harmonics
percentage on LCD, and the total harmonic
distortion ratio F and r will be cyclically
displayed.
4. Press ▲/▼ button to display value of each
measurement of the harmonic.
5. press MAX/MIN button to view Max or Min
value
Note:
1. You can select 50/60-Hz FIXED/AUTO
frequency test (AUTO). When input waveform
fluctuates, displayed harmonic values can be
kept stable if 50/60-Hz FIXED mode is selected.
2. Under AUTO frequency test mode, FFT